Hook buffing questions

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Ugh - my machine was making some noise & between quilts I checked out some old forums (should have probably just called apqs and still probably will tomorrow), but I added some oil to the top of the hook assembly. That & a different quilt top are my only changes. Thread is breaking constantly. it's being frayed somewhere. In checking through the hook - the only rough spot I have is on the "V". That's not shown as a place to buff or not to buff on the manual. Is there supposed to be a little tick there? Can I buff it? Anybody know?

I should note I have adjusted tension, changed needles twice, changed the bobbin thread & the bobbin case, changed the top thread to a different cone & a different brand (from superior/superbob to glide/magnaglide & every combination). Rethreaded fully multiple times.

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If you didn't just break a needle before your thread shredding I doubt the problem is with the hook. Grab the thread above and below the pigtail guides and move it in a circle around the inside of the guide. If it catches at all there is a groove worn there and that will cause shredding. Loosen the screw and rotate that guide 180 degrees and give that a try. It is not unusual to have to change the guides more than once per year depending on how much use the machine gets.

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I don't see it mentioned,so you might do a very thorough cleaning, or maybe even soak the hook overnight with WD40, followed by a thorough cleaning in the morning. You may have a thread or debris down in your hook assembly.

A good friend will come and bail you out of jail, but a best friend will be sitting next to you saying, 'Dang, that was fun'!

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I am following this "thread", because when I was quilting the last quilt I did, my thread kept breaking. I noticed it was only when I went from left to right, or maybe it was right to left. Anyway, I just finished the quilt going in the direction that worked. I was thinking that I somehow had a burr or something. I will give her a thorough cleaning and see what happens. Later.

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I buffed inside the needle hole & the bobbin basket. I have an M so it has what looks like a big mouth on it when you look down from the top. buffed that really good. Cleaned it up, added oil & it worked great.